/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchy.h
Filtered accessor to retrieve all elements of a given type
template<typename T> [TArray](API\Runtime\Core\Containers\TArray)< T * > GetFilteredElements ( [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< bool(T *)> InKeepElementFunction, bool bTraverse ) const